package com.hua.service.serviceImpl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.hua.common.BaseTool;
import com.hua.common.CustomError;
import com.hua.entities.*;
import com.hua.mapper.OrderMapper;
import com.hua.service.*;
import com.sun.prism.impl.BaseContext;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService{

    @Autowired
    private ShoppingCartServiceImpl service;

    @Autowired
    private OrderDetailServiceImpl orderDetailService;

    @Autowired
    private UserServiceImpl userService;

    @Autowired
    private AddressBookService addressBookService;
    @Override
    @Transactional
    public void paying(Orders orders) {

        //获得用户ID
        Long userId = BaseTool.getInfo();
        //查询用户数据
        User user = userService.getById(userId);
        //查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook==null){
            throw new CustomError("地址为空~~请添加地址");
        }
        //Mybatis
        long orderId = IdWorker.getId();//订单号

        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingGood = service.list(wrapper);

        //JUC里面的类，防止高并发情况下 数据出错
        AtomicInteger amount = new AtomicInteger();
        List<OrderDetail> orderDetails = shoppingGood.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //插入订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //插入订单详情数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车
        shoppingGood.remove(wrapper);

    }
}